Milling machine



Dec. 25, 1934. VANCIL ET AL 1,985,434

MILLING MACHINE Filed March 31, 1930 ED/NE D. WING/L 35% HENR Y J D 05 Wm Patented Dec. 25, 1934 Edgar-D, Vancil, Glhci PATENT OFFICE MACHINE nnati, and Henry J. Duds,

Montgomery, Ohio, assignorsto The Cincinnati Milling Machine Company, Cincinnati, Ohio, 21. corporationof Ohio 1 I Application Match 31,

Claims; (Cl. 30 -70) T This invention relates to rnilling" machines and o rt c la structuresfort .One of the principal obj vention'is the provisionof ly. 'im rcv adjusted to determined size cision and sub sequently clampe ements in bearing he cutterarbors of the same.

ectsof the presentinimproved outboard adjustablebearing fora" cutter arbor that may be wi at r; Pr

d to maintain that size durin operation of the machine;thus obviating'on the a i bushings fo "Afurther object of this invention 1 ing the 'present tendenc creep andthereby 7 reduce rbor an for r use'with cu Yof d oyerheatingof theparts i f this invention is to provide adjustableftapered tter arbor bearings.

s, to provide gauge means for adjustable tapered bushings of arbor bearings w be attained Other, obj vention sho to the. f ollowin junction with .the ac trative offone be understood tha hereby greater precision may in the adjustment of the same. ects and advantages-of the present in% uld be readily apparent by reference g specification made in the specific structure disclosed-within the scope 0 considered in concompanying drawing illus embodiment thereof, butfit will t anyv modifications may be details. hereinafter f the appendedclaims without departing from orf exceeding the spirit of the invention.

ence

Figure 1 is Referring to th bodying the principles of this Figure 4 is a detail sh her in position to permit the column of a milling ma ported thereon the outboard support the outboard end of the tool adapted to be driven by the cutter spindle 14 parts. with tapere otation d bore 14' in whic H e dr awing in which like referls in'dicate like parts: an elevation of a machine tool eminvention.

Figure 2 is a detail as viewed on the line 2-2 of Figure 1. Y

Figure 3 is a section on the line 33 of Figure 2.

owing the locking memadjustment of the bush- I In the drawing, reference numeral loindicates chine having sup- 1 which carries the or pendant 12 for journaling or cutter arbor 13 he spacers or bushtherewith, one such ed by the reference numeral outside diameter it has to provide an outboard tain range of adjustment ing fit between the 'uch bearings to 1930,8erialyNo. 440,411

pered split'bushing 15having a bore 16 adapted to receive therein the projecting end of the cut-'- ter arbor 13. This bushing is longitudinally adjusted in the bore 14' to vary the inside diameter of the'bore 16fand this adjustment may be accomplished by threading the smaller end of the bushing for the reception of an adjusting member 17. 'This member is in the form of a nut and for facilitating its rotation a plurality of small holes 18 maybe formed inits periphery for the reception of a spanner wrench or the like. In orderto prevent creepage of the bushing after adjustment, such as might be caused for instance,' by heating and expansion of the arbor under working conditions, provision has been made forlocking the clamping member 17 in its adjustedposition both with respect to either longitudinal or rotative movement. In the present embodiment the locking adjustment may take the form' of a rotatab eeper or locking member 20 such aslQhaVing an enlargedhead 20forengaging the peripheral shoulder 21 of the member 17 to prevent longitudinal movement thereof. The member 19 is also provided with a-reduced body portion 22 havin a fiat surface 23 formed there- 25 on.";-The ,periphery of themember 1'7 is provided with a plurality" df arcuate shaped notches 24 equally spaced thereabout'and 'each one representing [a vdetermined amount of reduction in size; such as 00026 of] an inch; fifth? internal d meter; t rleredbu h s. fl' e o era i n here is'su'chflthat whenthe' parts are the position shown in Figure 2 the circular portion of the body 22' neatly engages one of these arcuate shaped notches and thereby locks the member 17 against .rotative movement. In order to effect adjustment, the set screw 25 by which the member' 19 is attached to the pendant 12, is loosened permitting rotation of the member 19 until the flat surface 23 is tangent to the periphery of the 40 adjusting member as shown in Figure 4. The member17is now rotated and by'engagement with the surface 26, which is finished normal to the axis of the tapered bore draws the bushing 15 into its bore. After rotation of the nut 1'7 through sufficient angle to effect the desired adjustment, the member 19 is rotated to its locking position shown in Figure 2 and the set screw 25 tightened to lock the parts in adjusted position.

Attention is invited to the fact that the portion 22 of the member 19 is slightly less in length than the width of the periphery of themember 17 so that when the set screw 25 is tightened it not only looks the member 19 against rotation and thereby the member 17 but by engagement with the shoulder 21 it also prevents lateral bodily movement of the member 17 and thereby longitudinal creepage of the bushing 15. In other words, the member 17 engages the face of the pendant thereby preventing movement in one direction and the head engages the shoulder 21 of member 17 preventing movement in .the other direction. ;It is thus seen that a very efficient struhture has been provided for the purposes intended having a small number of parts which are simple to adjust.

What is claimed is:

1. In a device of the class described including a pendant for supporting a tool arbor, the combination of a bearing merit i fdr the arbgfrad justable axially thereof to vary diameter, a rotatable nut threaddon sweeten-*- ber and bearing against said pendant for eiiecting adjustment thereof, a lockifig riiemfier having first portion for engaging the periphery of the nut to hold the same against rotation, and a "sec. end. when ensa seh e tri hrth end of nut to wntwdalrmmmeat t re llieepmaq iix he??? a .R fi t su pe cutter arbo a 'ta e d ,ho gfqrm n... .e. pen m a. tase em nix et le u r s 319 1 331 b r mqmtne l ns 12 3 ,end. hgar pna riaqe 9n t Peedant Perpendicul r t t qa s 9 51 1 9F563, r ta Peripheral a tq o uimem e t re e 9 h dea end Qfl a d bash a and .ep a i fia ur a e I drawing the bushing into the bore to i reduce its internal diameter, a locking member spaced from the bu hin h ril gj lar head overlying the rag of the nut inerriberfor retaining it against said suriace and a portion for interlocking with ii n t neanephews: I'ret fm iii rotation, said lockingmember being rotatable to pre nt ante w e ma p -awr wip mi rsltai on. Q: the nut hile .Still maintaining overlapping engagement withth'e face thereof.

3, A milling machine having 'a' column, "a tool at p i nna q. adamant r cfiii' rqm oyer ma m unt d on th q mn l el to the arbor and having ,a p'eaaaht'fbr jouriialing thefree end of the arbon'in'cliidirig 'a tapered bore formed'in the pendant a' tapered "split in thefbore having a feadedreduced endp'icij cting from a face ofthependant which i i'normalfto the axis of'the'bo're, a'rot'at'ab'le nut member having ar'iotchedfperipliry reo'eivedon the redi'iciec'lend and engaging said face'for' moving tliebushing axially of the bore to reduce its internal diameter, a lock bushing adjacent the periphery of the member having an enlarged portion for retaining the member against the face of the pendant, a circumferential portion in the lock bushing interlocking with one of the notches for retaining the nut member against rotation, said lock bushing adapted tobe rotated-to present a fiatto the memb'er permitting rotation.

4. An arbor support bearing for a milling machine comprising a pendant having a tapered were formed therein, a tapered split bushing mounted in the bore having a reduced threaded end projecting from a face of the pendant which is'nqri ai to the ears the bore, a rotatable nut iiiefiitir 'a riotched periphery threaded on t "e reduced-end and engaging said face for moving the bushing axially of the bore to redtfce'dts internal diameter, a locking member spaced from the bushing having an enlarged head over-flying the face of the nut, said member being rotatable and "axially movable,-means to rothe the member into engagement with said notched eriphery to prevent positively rotation of the nut member, and means to effect axial movement ofthe locking member'to prevent posiaveiy'ahy akial'in'dvineiit or the nut member and thereby prevent 'axi'a1 'r'e'lia'g'e Of the "bushing during operation of themachiiie.

5. In ahbiitboardbea'fingfdr milling machine cutter armrs, "the "combination of a relatively xe pen ant support "h ving a tapered bore therein, a loiigitiidinallysplit bushing mounted in said here, said having in turn I a subs'tantially "cylindricalbore'foffeeiving an arbor, an adjusting "member threaded an 'the end of the bushing "bearing against said support, meansto'rot atejthemember to cause axialmovemam: of "the" bushing to vary" thereby the size of the internal 'boreo'f the bushing, a locking member cairliedby thesupportqmeans'on" th'e'periphefy or the adjusting "member cooperating with the making-memento determine th'e""amount"df arrange effected" in the internal diameter of "the bushing, 'iiieaiisfdn the rocking-member eifective upon partial rotation thereof to positively lock the adjusting iiiriibr against rotation, and-additional means onthe' locking m'eiribenfor' holding the adjusting member'and thereby the bushing in "a predetermined longitudinal position.

'n. HENRY JFD'O'DS. 

